<template>
  <div class="table">
    <div class="crumbs">
      <i class="el-icon-tickets"></i>评论信息
    </div>
    <div class="container">
      <div class="handle-box">
        <el-button type="primary" size="mini" @click="delAll">批量删除</el-button>
        <el-input v-model="select_word" size="mini" placeholder="筛选关键词" class="handle-input"></el-input>
      </div>
    </div>
    <el-table size="mini" ref="multipleTable" border style="width:100%" height="680px" :data="tableData" @selection-change="handleSelectChange">
      <el-table-column type="selection" width="40"></el-table-column>
      <el-table-column prop="name" label="用户名" align="center"></el-table-column>
      <el-table-column prop="content" label="评论内容" align="center"></el-table-column>
      <el-table-column label="操作" width="150" align="center">
        <template slot-scope="scope">
          <el-button size="mini" type="danger" @click="handleDelete(scope.row)">删除</el-button>
        </template>
      </el-table-column>
    </el-table>

    <el-dialog title="删除评论" :visible.sync="delVisible" width="300px" center>
      <div align="center">删除不可恢复，是否确定删除？</div>
      <span slot="footer">
                <el-button size="mini" @click="delVisible = false">取消</el-button>
                <el-button size="mini" @click="deleteRow">确定</el-button>
            </span>
    </el-dialog>
  </div>
</template>

<script>
  import { mixin } from '../mixins/index';
  import {getUserOfId,getCommentOfSongListId,deleteComment} from '../api/index';

  export default {
    mixins: [mixin],
    props: ['id'],
    data(){
      return{
        delVisible: false,          //删除弹窗是否显示
        tableData: [],
        tempData: [],
        select_word: '',
        idx: -1,          //当前选择项
        multipleSelection: [],   //哪些项已经打勾
      }
    },
    watch:{
      //搜索框里面的内容发生变化的时候，搜索结果table列表的内容跟着它的内容发生变化
      select_word: function(){
        if(this.select_word == ''){
          this.tableData = this.tempData;
        }else{
          this.tableData = [];
          for(let item of this.tempData){
            if(item.name.includes(this.select_word)){
              this.tableData.push(item);
            }
          }
        }
      }
    },
    created(){
      this.getData();
    },
    methods:{
      //查询指定歌单的评论列表
      getData(){
        this.tempData = [];
        this.tableData = [];
        getCommentOfSongListId(this.$route.query.id).then(res => {
          for(let item of res){
            this.getUsers(item.userId,item);
          }
        })
      },
      //获取用户名，连同本对象放到tempData和tableData里面
      getUsers(id,item){
        getUserOfId(id)
          .then(res => {
            let o = item;
            o.name = res.username;
            this.tempData.push(o);
            this.tableData.push(o);
          })
          .catch(err => {
            console.log(err);
          });
      },
      //删除一条评论
      deleteRow(){
        deleteComment(this.idx.id)
          .then(res => {
            if(res){
              this.getData();
              this.notify("删除成功","success");
            }else{
              this.notify("删除失败","error");
            }
          })
          .catch(err => {
            console.log(err);
          });
        this.delVisible = false;
      },
      //批量删除已经选择的项
      delAll(){
        for(let item of this.multipleSelection){
          this.handleDelete(item);
          this.deleteRow();
        }
        this.multipleSelection = [];
      }
    }
  }
</script>

<style scoped>
  .handle-box{
    margin-bottom: 20px;
  }
  .handle-input{
    width: 300px;
    display: inline-block;
  }
</style>
